<html>
<head>
<title>placeholder</title>
</head>
<body>
    <#if !(placeholders??) || placeholders?size lt 1 >
    <h2>placeholders 列表为空</h2>
    <#else>
    <ol>
        <#list placeholders?keys?sort as key>
        <li>
            ${key!}=${placeholders[key]!}
            <br />
        </li>
        </#list>
    </ol>
    </#if>
</body>
</html>